*,::before,::after{
    margin: 0;
    padding: 0;
}
ul{
    list-style: none;
}
body{
    height: 100%;
}
a{
    text-decoration: none;
    color: #000;
}
.clear::before,
.clear::after{
    content: ".";
    display: none;
    height: 0;
    visibility: hidden;
    clear: both;
}
.el-cascader-panel{
    height: 200px;
  }